Multiple electric fuse cut-out.



N0. 898,086. PATENTED SEPT. 8, 1908. W. BOEHM. MULTIPLE ELECTRIC FUSE OUT-OUT.

APPLICATION FILED JUNE 8, 1907.

awvewtoz wi/hmaoow 40 merel illustrates the body thereof conven- WILHELM BOEHM, OF BERIilN-CHARLOTTENBURG, GERMANY.

' MULTTPLIE ELECTRIC FUSE CUT-OUT.

No. seaose.

Specification of Letters Iatent.

Patented Sept. 8, 1908.

Application filed Tune 8, 1907. Serial No. 373,035.

To all whom it may concern:

Be it known that l, WILHELM BonnM, a subject of the Emperor of Germany, and resident of Berlin-Charlottenburg, Germany, have invented certain new and useful Improvements in Multiple Electric Fuse Cut- Outs, of which the following is a full, clear,

and exact description. I I

The fusible. cut-outs commonly employed in electric Work are generally destroyed and have to be discarded after one operation oruse thereof. It has been heretofore proposed to rovide a multiple device, or ,one

' which 001 d be used to automatically break an electric circuit a plurality of times, but such fuses have been objectionable because the maximum number of times that they could be employed was extremely limited and their construction has been both difficult and expensive. Such fuses have also been objectionable because it was impossible to readil repair the same. The c ject of the present invention provide a multiple fuse cut-out which may,

y a slight adjustment, be adapted for a large number of operations and will be descr1bed lIlCOIIIIGCtlOIl with the accompanying drawings, in-which,

Figure l is a sectional view through a'fusible cut-out plug constructed in accordance with the present invention; Fig.2 is a detail view of the fuse removed from the plug; Fig. 3 is a detail on an enlarged scale of one section of the fuse.

Referring to the drawing, 1 designates the body of the plug or holder for a fusible cutout'which may be of any suitable style and is formed of porcelain or other insulating material. As the invention may be employed with plugs of various styles the drawing tiona y. The fuse proper consists of a core 2 of asbestos or other non-combustible material aboutwhich is wound a fusible wire 3. This wire is soldered at intervals between metal sleeves orbands 4, 5, surrounding the core 2, the inner bands 4 being held securely on the non-combustible core. Each section of the fuse wire is of such length as to extend between the contacts in the plug. As shown the lateral or side contact 6 is electrically connected as at 7 with a plate 8 within the plug and the other contact is made in the orm of a split sleeve 9 and a nut 10 ads ted to be screwed ugon the exposed end 0 the sleeve 9 andho d the sections thereof tois to gether and in contact with one of the bands .5 of the fuse. A 'set screw 11 is adapted to hold the next band 5 of the series against the contact 8 and the circuit is therefore completed through the fusible wire 3 between the contacts 8, 10. The fuse is made of such length that it will include, say twenty sections, each long enough to extend from the contact 8 to the contact nut 19 and the body thereof is coiled upon a spool or spindle 12 of insulating and non-combustible material which is supported in a suitable pocket or chamber in the plug 1.

In case the'operative section of the fuse between the contacts 8 and 10 is destroyed by the passage of an excessively heavy cur rent. the usefulness of the cut-out is not entirely destroyed because a new section of the fuse may be readily positioned between said contacts. That. is, by loosening the screw 11 and removing the nut 10 the projecting end of the non-combustible core maybe engagged and thereby the fuse drawn longitz'dinally through the plug, unwinding from the engaging the collar 8 is properly positioned within the sleeve '9 and the next band or ring of the fuse is brought against the contact 8 when. the screw 11 and nut 10 may be adjusted to properly complete the circuit. In case the entire length or fuse has been used it will be seen that a new one may be readily coiled about the spool 12 and passed into the longitudinal passage of the plug, thus quickly restoring the device toits normal condition.

1 Having thus described the invention. what I claim and desire to secure by Letters-Patout is 1. The herein described multiple electric cut-out consisting of a plug-like body of nonconductin material having a passage extending t rough one end thereof, a fuse withinthe passage comprising a plurality of independent sections, a contact having a member on the outside of the body and havin within said passage two relatively adj ustable members between which the fuse passes, and a second contact engaging the fuse and closing one end of the passage, each section of the fuse having a non-combustible core and beingof such length as to extend from one contact to the other.

2. The herein described multiple electric cut-out consisting of a plug-like body of non: conducting material having a passage extending through one end thereof, a fuse within .the assage comprising a plurality of indepen ent sections,-a contact having a member on the'outside of the body and havin within said passage two reiatively adjustabf e members between which the fuse passes, and a second contact having an inner tubular member arranged within the passage and receiving one end of the fuse, and a clamping memher extending to the outside of the body and engaging said inner member to hold it in electrical connection with the fuse, each section of the fuse having a non-combustible core to extend from and a non-combustible core, a spool supporting the body of the fuse at the inner end of the passage, and two contacts arranged to detachably engage the same'section of the fuse within the passage and each having a member extending to the outer suirface of the body. i p

4. A multiple electric cut out consisting of 'a suitable body having two separated contacts, a, fuse comprising a non-combustible core, a plurality of fusible sections each of such length as to extend from one of said contacts to the other, and metal bands connecting the terminals of the fusible sections with" said core, and means for detachably holding eeaose said bands in electrical connection with the contacts.

5. A. multi le electric cut out consisting of a suitable b0 y provided with two separated contacts, a fuse consisting of a non-combustible core, a plurality of metal rings or bands secured to. said core at intervals corresponding to the distance between said contacts and a fusible wire connecting said bands, and means for holdingthe bands at the ends of any section of said wire in electrical connection with said contacts.

6. The herein described fuse for a multiple electric cutout consisting of a flexible core or body of non-combustible material, a plurality of contacts secured at intervals throughout the length of said body, and a plurality of sections of fusible wire connecting said contacts.

7. The herein described fuse for a multiple electric contact consisting of a flexible core of non-combustible material, a plurality of metal bands secured to said core at suitable intervals, fusible wires extending between said bands and additional rings or hands surrounding those aforesaid and the terminals of said fusible wires and electrically connected therewith.

in testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

' WILHELM BOEHll/l. Witnesses:

SIEGBERT KANronoWroz, CHARLOTTE BARUOH. 

